优化标题生成功能

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.opencode/tools/dynamic_http_call.ts

@@ -1,7 +1,10 @@
 import { tool } from "@opencode-ai/plugin";
+import { ToolSessionContextStore } from "../../src/session/toolContextStore.js";
 
 const internalBaseUrl = process.env.TJWATER_AGENT_INTERNAL_BASE_URL ?? "http://127.0.0.1:8787";
 const internalToken = process.env.TJWATER_AGENT_INTERNAL_TOKEN ?? "";
+const toolContextStore = new ToolSessionContextStore();
+const initializePromise = toolContextStore.initialize();
 
 export default tool({
   description:
@@ -21,6 +24,11 @@ export default tool({
       .describe("Query arguments object."),
   },
   async execute(args, context) {
+    await initializePromise;
+    const sessionContext = await toolContextStore.read(context.sessionID);
+    if (!sessionContext) {
+      throw new Error(`session context not found for ${context.sessionID}`);
+    }
     // 工具本身不直接持有用户 token；通过 sessionID 回调 Agent 服务，由服务侧补齐用户上下文。
     const response = await fetch(`${internalBaseUrl}/internal/tools/dynamic-http-call`, {
       method: "POST",
@@ -29,7 +37,7 @@ export default tool({
         "x-agent-internal-token": internalToken,
       },
       body: JSON.stringify({
-        sessionId: context.sessionID,
+        sessionScopeKey: sessionContext.sessionScopeKey,
         reason: args.reason,
         path: args.path,
         method: args.method,

.opencode/tools/fetch_result_ref.ts

@@ -1,7 +1,10 @@
 import { tool } from "@opencode-ai/plugin";
+import { ToolSessionContextStore } from "../../src/session/toolContextStore.js";
 
 const internalBaseUrl = process.env.TJWATER_AGENT_INTERNAL_BASE_URL ?? "http://127.0.0.1:8787";
 const internalToken = process.env.TJWATER_AGENT_INTERNAL_TOKEN ?? "";
+const toolContextStore = new ToolSessionContextStore();
+const initializePromise = toolContextStore.initialize();
 
 export default tool({
   description:
@@ -19,6 +22,11 @@ export default tool({
       .describe("Optional maximum number of top-level items or fields to return."),
   },
   async execute(args, context) {
+    await initializePromise;
+    const sessionContext = await toolContextStore.read(context.sessionID);
+    if (!sessionContext) {
+      throw new Error(`session context not found for ${context.sessionID}`);
+    }
     const response = await fetch(`${internalBaseUrl}/internal/tools/fetch-result-ref`, {
       method: "POST",
       headers: {
@@ -26,7 +34,7 @@ export default tool({
         "x-agent-internal-token": internalToken,
       },
       body: JSON.stringify({
-        sessionId: context.sessionID,
+        sessionScopeKey: sessionContext.sessionScopeKey,
         result_ref: args.result_ref,
         max_items: args.max_items,
       }),

.opencode/tools/memory_manager.ts

@@ -80,7 +80,7 @@ export default tool({
     if (args.action === "add") {
       const result = await memoryStore.upsert(scope, scopeKey, {
       content: args.content ?? "",
-      sessionId: context.sessionID,
+      sessionId: sessionContext.clientSessionId,
       source: "tool",
       traceId: sessionContext.traceId,
       });
@@ -105,7 +105,7 @@ export default tool({
     if (args.action === "replace") {
       const result = await memoryStore.replace(scope, scopeKey, args.target_id ?? "", {
       content: args.content ?? "",
-      sessionId: context.sessionID,
+      sessionId: sessionContext.clientSessionId,
       source: "tool",
       traceId: sessionContext.traceId,
       });

.opencode/tools/render_junctions.ts

@@ -2,7 +2,7 @@ import { tool } from "@opencode-ai/plugin";
 
 export default tool({
   description:
-    "在前端地图上对 junctions 图层应用分区渲染。优先直接传入 render_ref（指向已持久化的渲染结果引用，格式应为 res-...），不要传 /tmp/*.json 之类的临时文件路径，也不要先把 ref 内容完整读出再重组；前端会自行根据 render_ref 拉取完整 payload 并渲染，这样可以避免 LLM 读取大型 node_area_map。若当前只有本地 JSON 文件，请先调用 store_render_ref 把它迁移为受控 render_ref。供 render_ref 引用的 JSON 结构必须为 { node_area_map: Record<string, string>, area_ids?: string[], area_colors?: Record<string, string> }，其中 node_area_map 的 key 是 junction/node id，value 是 area id。",
+    "在前端地图上对 junctions 图层应用分区渲染。优先直接传入 render_ref（指向已持久化的渲染结果引用，格式应为 res-...），也不要先把 ref 内容完整读出再重组；前端会自行根据 render_ref 拉取完整 payload 并渲染，这样可以避免 LLM 读取大型 node_area_map。若当前只有本地 JSON 文件，请先调用 store_render_ref 把它迁移为受控 render_ref。供 render_ref 引用的 JSON 结构必须为 { node_area_map: Record<string, string>, area_ids?: string[], area_colors?: Record<string, string> }，其中 node_area_map 的 key 是 junction/node id，value 是 area id。",
   args: {
     reason: tool.schema
       .string()
@@ -10,7 +10,7 @@ export default tool({
     render_ref: tool.schema
       .string()
       .describe(
-        "渲染引用 ID。必须是持久化结果引用（res-...），不要传 /tmp/*.json 或其他本地路径。前端会按该引用读取完整 payload.data 并渲染，不需要先用 fetch_result_ref 提取完整数据。render_ref 对应的数据结构必须是 { node_area_map: { [junctionId]: areaId }, area_ids?: string[], area_colors?: { [areaId]: color } }；node_area_map 必填，area_ids / area_colors 可选。",
+        "渲染引用 ID。必须是持久化结果引用（res-...）。前端会按该引用读取完整 payload.data 并渲染，不需要先用 fetch_result_ref 提取完整数据。render_ref 对应的数据结构必须是 { node_area_map: { [junctionId]: areaId }, area_ids?: string[], area_colors?: { [areaId]: color } }；node_area_map 必填，area_ids / area_colors 可选。",
       ),
   },
   async execute() {

.opencode/tools/session_search.ts

@@ -1,8 +1,11 @@
 import { tool } from "@opencode-ai/plugin";
+import { ToolSessionContextStore } from "../../src/session/toolContextStore.js";
 
 const internalBaseUrl =
   process.env.TJWATER_AGENT_INTERNAL_BASE_URL ?? "http://127.0.0.1:8787";
 const internalToken = process.env.TJWATER_AGENT_INTERNAL_TOKEN ?? "";
+const toolContextStore = new ToolSessionContextStore();
+const initializePromise = toolContextStore.initialize();
 
 export default tool({
   description:
@@ -22,6 +25,11 @@ export default tool({
       .describe("Optional maximum number of hits to return."),
   },
   async execute(args, context) {
+    await initializePromise;
+    const sessionContext = await toolContextStore.read(context.sessionID);
+    if (!sessionContext) {
+      throw new Error(`session context not found for ${context.sessionID}`);
+    }
     const response = await fetch(`${internalBaseUrl}/internal/tools/session-search`, {
       method: "POST",
       headers: {
@@ -31,7 +39,7 @@ export default tool({
       body: JSON.stringify({
         max_results: args.max_results,
         query: args.query,
-        sessionId: context.sessionID,
+        sessionScopeKey: sessionContext.sessionScopeKey,
       }),
     });
     const text = await response.text();

.opencode/tools/store_render_ref.ts

@@ -1,7 +1,10 @@
 import { tool } from "@opencode-ai/plugin";
+import { ToolSessionContextStore } from "../../src/session/toolContextStore.js";
 
 const internalBaseUrl = process.env.TJWATER_AGENT_INTERNAL_BASE_URL ?? "http://127.0.0.1:8787";
 const internalToken = process.env.TJWATER_AGENT_INTERNAL_TOKEN ?? "";
+const toolContextStore = new ToolSessionContextStore();
+const initializePromise = toolContextStore.initialize();
 
 export default tool({
   description:
@@ -12,9 +15,16 @@ export default tool({
       .describe("Why this local render payload should be persisted as a render_ref."),
     file_path: tool.schema
       .string()
-      .describe("Absolute path to a local JSON file containing the render payload or a wrapper object with data."),
+      .describe(
+        "Absolute path to a local JSON file containing the raw render payload, or a wrapper object with data, metadata, and location. If wrapper metadata/location is missing or stale, the resolver will normalize and write it back before storing the render_ref.",
+      ),
   },
   async execute(args, context) {
+    await initializePromise;
+    const sessionContext = await toolContextStore.read(context.sessionID);
+    if (!sessionContext) {
+      throw new Error(`session context not found for ${context.sessionID}`);
+    }
     const response = await fetch(`${internalBaseUrl}/internal/tools/store-render-ref`, {
       method: "POST",
       headers: {
@@ -22,7 +32,7 @@ export default tool({
         "x-agent-internal-token": internalToken,
       },
       body: JSON.stringify({
-        sessionId: context.sessionID,
+        sessionScopeKey: sessionContext.sessionScopeKey,
         file_path: args.file_path,
       }),
     });

src/chat/sessionBridge.ts

@@ -2,10 +2,25 @@ import { randomUUID } from "node:crypto";
 
 import { logger } from "../logger.js";
 import { type OpencodeRuntimeAdapter } from "../runtime/opencode.js";
-import { type SessionBinding, type SessionContext, SessionRegistry } from "../session/registry.js";
-import { ToolSessionContextStore } from "../session/toolContextStore.js";
+import {
+  buildToolSessionScopeKey,
+  ToolSessionContextStore,
+} from "../session/toolContextStore.js";
 import { toActorKey, toProjectKey } from "../utils/fileStore.js";
 
+export type SessionBinding = {
+  clientSessionId: string;
+  sessionId: string;
+  startedAt: number;
+};
+
+export type SessionContext = {
+  clientSessionId: string;
+  accessToken?: string;
+  projectId?: string;
+  userId?: string;
+};
+
 export type ChatRequestContext = SessionContext & {
   actorKey: string;
   projectKey: string;
@@ -13,15 +28,12 @@ export type ChatRequestContext = SessionContext & {
 };
 
 export class ChatSessionBridge {
-  // 这里额外保存 session -> 用户上下文，供工具桥在服务端代发真实后端请求时复用。
-  private readonly sessionContexts = new Map<string, ChatRequestContext>();
-  private readonly sessionTitles = new Map<string, string>();
+  // runtime session 仅在单次请求生命周期内有效；线程连续性由 clientSessionId 对应的持久状态承担。
+  private readonly activeRuntimeSessions = new Map<string, string>();
+  private readonly activeSensitiveContexts = new Map<string, ChatRequestContext>();
   private readonly toolContextStore = new ToolSessionContextStore();
 
-  constructor(
-    private readonly registry: SessionRegistry,
-    private readonly runtime: OpencodeRuntimeAdapter,
-  ) {}
+  constructor(private readonly runtime: OpencodeRuntimeAdapter) {}
 
   async resolve(context: {
     clientSessionId?: string;
@@ -34,61 +46,22 @@ export class ChatSessionBridge {
     requestContext: ChatRequestContext;
     created: boolean;
   }> {
-    const requestContext: ChatRequestContext = {
-      clientSessionId:
-        context.clientSessionId?.trim() || `agent-${randomUUID().slice(0, 12)}`,
-      accessToken: context.accessToken,
-      actorKey: toActorKey(context.userId),
-      projectId: context.projectId,
-      projectKey: toProjectKey(context.projectId),
-      traceId: context.traceId?.trim() || `trace-${randomUUID().slice(0, 12)}`,
-      userId: context.userId?.trim(),
-    };
-
-    this.cleanupExpired();
-
-    const current = this.registry.get(requestContext);
-    if (current) {
-      this.sessionContexts.set(current.sessionId, requestContext);
-      await this.toolContextStore.write({
-        actorKey: requestContext.actorKey,
-        allowLearningWrite: true,
-        clientSessionId: requestContext.clientSessionId,
-        learningMode: "interactive",
-        projectId: requestContext.projectId,
-        projectKey: requestContext.projectKey,
-        sessionId: current.sessionId,
-        traceId: requestContext.traceId,
-      });
-      try {
-        // 只有 opencode 侧 session 仍存在时，才复用本地映射。
-        await this.runtime.getSession(current.sessionId);
-        await this.runtime.waitForSessionIdle(current.sessionId).catch((error) => {
-          logger.warn(
-            {
-              clientSessionId: requestContext.clientSessionId,
-              sessionId: current.sessionId,
-              err: error,
-            },
-            "failed while waiting for reused opencode session to become idle",
-          );
-        });
-        return { binding: current, requestContext, created: false };
-      } catch (error) {
-        logger.warn(
-          {
-            clientSessionId: requestContext.clientSessionId,
-            sessionId: current.sessionId,
-            err: error,
-          },
-          "existing opencode session lookup failed, creating a new session",
-        );
-      }
-    }
+    const requestContext = this.buildRequestContext(context);
+    await this.abortActiveRuntime(requestContext.clientSessionId);
 
     const session = await this.runtime.createSession(requestContext.clientSessionId);
-    const binding = this.registry.upsert(requestContext, session.id);
-    this.sessionContexts.set(binding.sessionId, requestContext);
+    const binding: SessionBinding = {
+      clientSessionId: requestContext.clientSessionId,
+      sessionId: session.id,
+      startedAt: Date.now(),
+    };
+    const sessionScopeKey = buildToolSessionScopeKey(
+      requestContext.actorKey,
+      requestContext.projectKey,
+      requestContext.clientSessionId,
+    );
+    this.activeRuntimeSessions.set(requestContext.clientSessionId, session.id);
+    this.activeSensitiveContexts.set(sessionScopeKey, requestContext);
     await this.toolContextStore.write({
       actorKey: requestContext.actorKey,
       allowLearningWrite: true,
@@ -96,105 +69,70 @@ export class ChatSessionBridge {
       learningMode: "interactive",
       projectId: requestContext.projectId,
       projectKey: requestContext.projectKey,
-      sessionId: binding.sessionId,
+      sessionId: session.id,
+      sessionScopeKey,
       traceId: requestContext.traceId,
     });
+
     return { binding, requestContext, created: true };
   }
 
   count(): number {
-    return this.registry.count();
+    return this.activeRuntimeSessions.size;
   }
 
-  getSessionContext(sessionId: string) {
-    return this.sessionContexts.get(sessionId) ?? null;
+  createClientSessionId() {
+    return `agent-${randomUUID().slice(0, 12)}`;
   }
 
-  getSessionTitle(sessionId: string) {
-    return this.sessionTitles.get(sessionId);
-  }
-
-  setSessionTitle(sessionId: string, title: string) {
-    const normalized = title.trim();
-    if (!normalized) {
-      return;
-    }
-    this.sessionTitles.set(sessionId, normalized);
-  }
-
-  cloneSessionTitle(sourceSessionId: string, targetSessionId: string) {
-    const existingTitle = this.sessionTitles.get(sourceSessionId);
-    if (!existingTitle) {
-      return;
-    }
-    this.sessionTitles.set(targetSessionId, existingTitle);
+  getActiveSensitiveContext(sessionScopeKey: string) {
+    return this.activeSensitiveContexts.get(sessionScopeKey) ?? null;
   }
 
   async abort(context: {
     clientSessionId?: string;
-    accessToken?: string;
-    projectId?: string;
-    traceId?: string;
-    userId?: string;
   }): Promise<SessionBinding | null> {
     const clientSessionId = context.clientSessionId?.trim();
     if (!clientSessionId) {
       return null;
     }
 
-    const requestContext: ChatRequestContext = {
-      clientSessionId,
-      accessToken: context.accessToken,
-      actorKey: toActorKey(context.userId),
-      projectId: context.projectId,
-      projectKey: toProjectKey(context.projectId),
-      traceId: context.traceId?.trim() || `trace-${randomUUID().slice(0, 12)}`,
-      userId: context.userId?.trim(),
-    };
-
-    this.cleanupExpired();
-
-    const binding = this.registry.get(requestContext);
-    if (!binding) {
+    const sessionId = this.activeRuntimeSessions.get(clientSessionId);
+    if (!sessionId) {
       return null;
     }
 
-    this.sessionContexts.set(binding.sessionId, requestContext);
-    await this.toolContextStore.write({
-      actorKey: requestContext.actorKey,
-      allowLearningWrite: true,
-      clientSessionId: requestContext.clientSessionId,
-      learningMode: "interactive",
-      projectId: requestContext.projectId,
-      projectKey: requestContext.projectKey,
-      sessionId: binding.sessionId,
-      traceId: requestContext.traceId,
-    });
-    await this.runtime.abortSession(binding.sessionId);
-    await this.runtime.waitForSessionIdle(binding.sessionId).catch((error) => {
-      logger.warn(
-        { clientSessionId, sessionId: binding.sessionId, err: error },
-        "failed while waiting for aborted opencode session to become idle",
-      );
-    });
-    return binding;
+    await this.abortActiveRuntime(clientSessionId);
+    return {
+      clientSessionId,
+      sessionId,
+      startedAt: Date.now(),
+    };
   }
 
-  async fork(context: {
+  async releaseRuntimeSession(clientSessionId: string, sessionId: string) {
+    const activeSessionId = this.activeRuntimeSessions.get(clientSessionId);
+    if (activeSessionId === sessionId) {
+      this.activeRuntimeSessions.delete(clientSessionId);
+    }
+    this.activeSensitiveContexts.delete(findScopeKey(this.activeSensitiveContexts, clientSessionId));
+    await this.toolContextStore.remove(sessionId).catch((error) => {
+      logger.debug({ sessionId, err: error }, "failed to cleanup runtime tool context");
+    });
+    await this.runtime.abortSession(sessionId).catch((error) => {
+      logger.debug({ sessionId, err: error }, "failed to cleanup runtime session");
+    });
+  }
+
+  private buildRequestContext(context: {
     clientSessionId?: string;
     accessToken?: string;
     projectId?: string;
     traceId?: string;
-    keepMessageCount: number;
     userId?: string;
-  }): Promise<{
-    binding: SessionBinding;
-    requestContext: ChatRequestContext;
-    created: boolean;
-  }> {
-    const currentClientSessionId = context.clientSessionId?.trim();
-    const nextRequestContext: ChatRequestContext = {
-      clientSessionId: `agent-${randomUUID().slice(0, 12)}`,
+  }): ChatRequestContext {
+    return {
+      clientSessionId: context.clientSessionId?.trim() || this.createClientSessionId(),
       accessToken: context.accessToken,
       actorKey: toActorKey(context.userId),
       projectId: context.projectId,
@@ -202,95 +140,39 @@ export class ChatSessionBridge {
       traceId: context.traceId?.trim() || `trace-${randomUUID().slice(0, 12)}`,
       userId: context.userId?.trim(),
     };
-
-    this.cleanupExpired();
-
-    if (!currentClientSessionId || context.keepMessageCount <= 0) {
-      const session = await this.runtime.createSession(nextRequestContext.clientSessionId);
-      const binding = this.registry.upsert(nextRequestContext, session.id);
-      this.sessionContexts.set(binding.sessionId, nextRequestContext);
-      await this.toolContextStore.write({
-        actorKey: nextRequestContext.actorKey,
-        allowLearningWrite: true,
-        clientSessionId: nextRequestContext.clientSessionId,
-        learningMode: "interactive",
-        projectId: nextRequestContext.projectId,
-        projectKey: nextRequestContext.projectKey,
-        sessionId: binding.sessionId,
-        traceId: nextRequestContext.traceId,
-      });
-      return { binding, requestContext: nextRequestContext, created: true };
   }
 
-    const currentContext: ChatRequestContext = {
-      clientSessionId: currentClientSessionId,
-      accessToken: context.accessToken,
-      actorKey: toActorKey(context.userId),
-      projectId: context.projectId,
-      projectKey: toProjectKey(context.projectId),
-      traceId: nextRequestContext.traceId,
-      userId: context.userId?.trim(),
-    };
-
-    const current = this.registry.get(currentContext);
-    if (!current) {
-      const session = await this.runtime.createSession(nextRequestContext.clientSessionId);
-      const binding = this.registry.upsert(nextRequestContext, session.id);
-      this.sessionContexts.set(binding.sessionId, nextRequestContext);
-      await this.toolContextStore.write({
-        actorKey: nextRequestContext.actorKey,
-        allowLearningWrite: true,
-        clientSessionId: nextRequestContext.clientSessionId,
-        learningMode: "interactive",
-        projectId: nextRequestContext.projectId,
-        projectKey: nextRequestContext.projectKey,
-        sessionId: binding.sessionId,
-        traceId: nextRequestContext.traceId,
-      });
-      return { binding, requestContext: nextRequestContext, created: true };
+  private async abortActiveRuntime(clientSessionId: string) {
+    const activeSessionId = this.activeRuntimeSessions.get(clientSessionId);
+    if (!activeSessionId) {
+      return;
     }
-
-    await this.runtime.getSession(current.sessionId);
-    const messages = await this.runtime.messages(
-      current.sessionId,
-      Math.max(100, context.keepMessageCount + 20),
+    this.activeRuntimeSessions.delete(clientSessionId);
+    this.activeSensitiveContexts.delete(findScopeKey(this.activeSensitiveContexts, clientSessionId));
+    await this.toolContextStore.remove(activeSessionId).catch(() => undefined);
+    await this.runtime.abortSession(activeSessionId).catch((error) => {
+      logger.warn(
+        { clientSessionId, sessionId: activeSessionId, err: error },
+        "failed to abort previous active runtime session",
       );
-    const chatMessages = messages.filter(
-      (message) => message.info.role === "user" || message.info.role === "assistant",
+    });
+    await this.runtime.waitForSessionIdle(activeSessionId).catch((error) => {
+      logger.warn(
+        { clientSessionId, sessionId: activeSessionId, err: error },
+        "failed while waiting for previous runtime session to become idle",
       );
-    const keepMessage = chatMessages[context.keepMessageCount - 1];
-
-    if (!keepMessage) {
-      throw new Error(`fork keep point not found for message count ${context.keepMessageCount}`);
-    }
-
-    const session = await this.runtime.forkSession(current.sessionId, keepMessage.info.id);
-    const binding = this.registry.upsert(nextRequestContext, session.id);
-    this.sessionContexts.set(binding.sessionId, nextRequestContext);
-    await this.toolContextStore.write({
-      actorKey: nextRequestContext.actorKey,
-      allowLearningWrite: true,
-      clientSessionId: nextRequestContext.clientSessionId,
-      learningMode: "interactive",
-      projectId: nextRequestContext.projectId,
-      projectKey: nextRequestContext.projectKey,
-      sessionId: binding.sessionId,
-      traceId: nextRequestContext.traceId,
     });
-    this.cloneSessionTitle(current.sessionId, binding.sessionId);
-    return { binding, requestContext: nextRequestContext, created: true };
-  }
-
-  cleanupExpired(): void {
-    const expiredSessionIds = this.registry.evictExpired();
-    for (const sessionId of expiredSessionIds) {
-      this.sessionContexts.delete(sessionId);
-      this.sessionTitles.delete(sessionId);
-      void this.toolContextStore.remove(sessionId);
-      // 这里用 abort 做轻量清理；即使失败，也不阻断本地过期回收。
-      void this.runtime.abortSession(sessionId).catch((error) => {
-        logger.debug({ sessionId, err: error }, "ignoring failed abort for expired session");
-      });
-    }
   }
 }
+
+const findScopeKey = (
+  contexts: Map<string, ChatRequestContext>,
+  clientSessionId: string,
+) => {
+  for (const [scopeKey, context] of contexts.entries()) {
+    if (context.clientSessionId === clientSessionId) {
+      return scopeKey;
+    }
+  }
+  return clientSessionId;
+};

src/config.ts

@@ -45,8 +45,6 @@ const envSchema = z
     OPENCODE_MODEL: z.string().default("deepseek/deepseek-v4-pro"),
     // client 模式下，目标 opencode server 的基础地址。
     OPENCODE_CLIENT_BASE_URL: z.string().url().optional(),
-    // chat session 在本地注册表中的保活时长（秒）。
-    SESSION_TTL_SECONDS: z.coerce.number().int().positive().default(1800),
     // 提供给本地 opencode tools 读取的会话上下文目录。
     SESSION_CONTEXT_STORAGE_DIR: z.string().default("./data/session-contexts"),
     // TJWater 后端 API 的基础地址。
@@ -65,6 +63,10 @@ const envSchema = z
     MEMORY_MAX_PROMPT_CHARS: z.coerce.number().int().positive().default(1800),
     // session transcript 持久化目录。
     SESSION_HISTORY_STORAGE_DIR: z.string().default("./data/session-history"),
+    // conversation metadata 持久化目录。
+    CONVERSATION_STORAGE_DIR: z.string().default("./data/conversations"),
+    // conversation UI state 持久化目录。
+    CONVERSATION_STATE_STORAGE_DIR: z.string().default("./data/conversation-states"),
     // 每个会话最多保留多少轮 transcript，超过后裁剪旧记录。
     SESSION_HISTORY_MAX_TURNS_PER_SESSION: z.coerce
       .number()

src/conversations/stateStore.ts

@@ -0,0 +1,41 @@
+import { join } from "node:path";
+
+import { config } from "../config.js";
+import {
+  atomicWriteJson,
+  ensureDirectory,
+  readJsonFile,
+  removeFileIfExists,
+} from "../utils/fileStore.js";
+
+export type ConversationStateRecord = {
+  sessionId: string;
+  isTitleManuallyEdited?: boolean;
+  messages: unknown[];
+  branchGroups: unknown[];
+};
+
+export class ConversationStateStore {
+  constructor(private readonly baseDir = config.CONVERSATION_STATE_STORAGE_DIR) {}
+
+  async initialize() {
+    await ensureDirectory(this.baseDir);
+  }
+
+  async read(sessionScopeKey: string) {
+    return await readJsonFile<ConversationStateRecord>(this.filePath(sessionScopeKey));
+  }
+
+  async write(sessionScopeKey: string, state: ConversationStateRecord) {
+    await atomicWriteJson(this.filePath(sessionScopeKey), state);
+    return state;
+  }
+
+  async remove(sessionScopeKey: string) {
+    await removeFileIfExists(this.filePath(sessionScopeKey));
+  }
+
+  private filePath(sessionScopeKey: string) {
+    return join(this.baseDir, `${sessionScopeKey}.json`);
+  }
+}

src/conversations/store.ts

@@ -0,0 +1,148 @@
+import { randomUUID } from "node:crypto";
+import { join } from "node:path";
+
+import { config } from "../config.js";
+import {
+  atomicWriteJson,
+  ensureDirectory,
+  listJsonFiles,
+  readJsonFile,
+  removeFileIfExists,
+} from "../utils/fileStore.js";
+import { toConversationScopeKey } from "../utils/fileStore.js";
+
+export type ConversationStatus = "active" | "archived";
+
+export type ConversationRecord = {
+  sessionId: string;
+  sessionScopeKey: string;
+  actorKey: string;
+  ownerUserId?: string;
+  projectId?: string;
+  projectKey: string;
+  parentSessionId?: string;
+  createdAt: string;
+  updatedAt: string;
+  status: ConversationStatus;
+  title?: string;
+};
+
+type ConversationContext = {
+  actorKey: string;
+  userId?: string;
+  projectId?: string;
+  projectKey: string;
+};
+
+type EnsureConversationInput = ConversationContext & {
+  sessionId?: string;
+  parentSessionId?: string;
+};
+
+export class ConversationStore {
+  constructor(private readonly baseDir = config.CONVERSATION_STORAGE_DIR) {}
+
+  async initialize() {
+    await ensureDirectory(this.baseDir);
+  }
+
+  async ensure(input: EnsureConversationInput) {
+    const sessionId = normalizeSessionId(input.sessionId) ?? createConversationSessionId();
+    const sessionScopeKey = toConversationScopeKey(
+      input.actorKey,
+      input.projectKey,
+      sessionId,
+    );
+    const existing = await readJsonFile<ConversationRecord>(this.filePath(sessionScopeKey));
+    if (existing) {
+      return { created: false, record: existing };
+    }
+
+    const now = new Date().toISOString();
+    const record: ConversationRecord = {
+      sessionId,
+      sessionScopeKey,
+      actorKey: input.actorKey,
+      ownerUserId: input.userId?.trim(),
+      projectId: input.projectId,
+      projectKey: input.projectKey,
+      parentSessionId: normalizeSessionId(input.parentSessionId),
+      createdAt: now,
+      updatedAt: now,
+      status: "active",
+    };
+    await atomicWriteJson(this.filePath(sessionScopeKey), record);
+    return { created: true, record };
+  }
+
+  async get(context: ConversationContext, sessionId: string) {
+    const normalizedSessionId = normalizeSessionId(sessionId);
+    if (!normalizedSessionId) {
+      return null;
+    }
+    return await readJsonFile<ConversationRecord>(
+      this.filePath(
+        toConversationScopeKey(context.actorKey, context.projectKey, normalizedSessionId),
+      ),
+    );
+  }
+
+  async touch(
+    record: ConversationRecord,
+    updates: Partial<Pick<ConversationRecord, "title" | "status">> = {},
+  ) {
+    const next: ConversationRecord = {
+      ...record,
+      ...normalizeConversationUpdates(updates),
+      updatedAt: new Date().toISOString(),
+    };
+    await atomicWriteJson(this.filePath(record.sessionScopeKey), next);
+    return next;
+  }
+
+  async list(context: ConversationContext) {
+    const files = await listJsonFiles(this.baseDir);
+    const records = await Promise.all(
+      files.map((file) => readJsonFile<ConversationRecord>(file)),
+    );
+    return records
+      .filter((record): record is ConversationRecord => Boolean(record))
+      .filter(
+        (record) =>
+          record.actorKey === context.actorKey &&
+          record.projectKey === context.projectKey,
+      )
+      .sort((left, right) => right.updatedAt.localeCompare(left.updatedAt));
+  }
+
+  async remove(record: ConversationRecord) {
+    await removeFileIfExists(this.filePath(record.sessionScopeKey));
+  }
+
+  private filePath(sessionScopeKey: string) {
+    return join(this.baseDir, `${sessionScopeKey}.json`);
+  }
+}
+
+export const createConversationSessionId = () => `chat-${randomUUID().slice(0, 16)}`;
+
+const normalizeSessionId = (value?: string) => {
+  const normalized = value?.trim();
+  return normalized ? normalized.slice(0, 128) : undefined;
+};
+
+const normalizeConversationUpdates = (
+  updates: Partial<Pick<ConversationRecord, "title" | "status">>,
+) => {
+  const normalized: Partial<Pick<ConversationRecord, "title" | "status">> = {};
+  if (updates.status === "active" || updates.status === "archived") {
+    normalized.status = updates.status;
+  }
+  if (typeof updates.title === "string") {
+    const trimmed = updates.title.trim();
+    if (trimmed) {
+      normalized.title = trimmed.slice(0, 120);
+    }
+  }
+  return normalized;
+};

src/history/store.ts

@@ -85,6 +85,7 @@ export class SessionHistoryStore {
         userMessage,
       };
       transcript.clientSessionId = context.clientSessionId ?? transcript.clientSessionId;
+      transcript.sessionId = context.sessionId;
       transcript.turns.push(record);
       if (transcript.turns.length > config.SESSION_HISTORY_MAX_TURNS_PER_SESSION) {
         transcript.turns = transcript.turns.slice(
@@ -108,6 +109,25 @@ export class SessionHistoryStore {
     return transcript.turns.slice(-Math.max(1, limit));
   }
 
+  async cloneThread(
+    sourceContext: SessionHistoryContext,
+    targetContext: SessionHistoryContext,
+    keepMessageCount: number,
+  ) {
+    const sourceTranscript = await this.readTranscript(sourceContext);
+    const timestamp = new Date().toISOString();
+    const nextTranscript: SessionTranscriptRecord = {
+      actorKey: targetContext.actorKey,
+      clientSessionId: targetContext.clientSessionId,
+      projectKey: targetContext.projectKey,
+      sessionId: targetContext.sessionId,
+      turns: projectTurnsForFork(sourceTranscript?.turns ?? [], keepMessageCount),
+      updatedAt: timestamp,
+    };
+    await atomicWriteJson(this.filePath(targetContext), nextTranscript);
+    return nextTranscript;
+  }
+
   async search(
     context: Pick<SessionHistoryContext, "actorKey" | "projectKey">,
     query: string,
@@ -156,7 +176,38 @@ export class SessionHistoryStore {
   }
 
   private async readTranscript(context: SessionHistoryContext) {
-    return await readJsonFile<SessionTranscriptRecord>(this.filePath(context));
+    const direct = await readJsonFile<SessionTranscriptRecord>(this.filePath(context));
+    if (direct) {
+      return direct;
+    }
+
+    const clientSessionId = context.clientSessionId?.trim();
+    if (!clientSessionId) {
+      return null;
+    }
+
+    const files = await listJsonFiles(this.baseDir);
+    const matches: SessionTranscriptRecord[] = [];
+    for (const file of files) {
+      const transcript = await readJsonFile<SessionTranscriptRecord>(file);
+      if (!transcript) {
+        continue;
+      }
+      if (
+        transcript.actorKey !== context.actorKey ||
+        transcript.projectKey !== context.projectKey ||
+        transcript.clientSessionId !== clientSessionId
+      ) {
+        continue;
+      }
+      matches.push(transcript);
+    }
+
+    if (matches.length === 0) {
+      return null;
+    }
+
+    return matches.sort((left, right) => right.updatedAt.localeCompare(left.updatedAt))[0] ?? null;
   }
 
   private filePath(context: SessionHistoryContext) {
@@ -211,3 +262,19 @@ const buildSnippet = (text: string, query: string) => {
   const suffix = end < compact.length ? "..." : "";
   return `${prefix}${snippet}${suffix}`;
 };
+
+const projectTurnsForFork = (
+  turns: SessionTurnRecord[],
+  keepMessageCount: number,
+): SessionTurnRecord[] => {
+  if (keepMessageCount <= 0) {
+    return [];
+  }
+
+  const keepTurnCount = Math.floor(keepMessageCount / 2);
+  if (keepTurnCount <= 0) {
+    return [];
+  }
+
+  return turns.slice(0, keepTurnCount);
+};

src/learning/orchestrator.ts

@@ -9,7 +9,10 @@ import { LearningStateStore } from "./stateStore.js";
 import { MemoryStore, type MemoryScope } from "../memory/store.js";
 import { type OpencodeRuntimeAdapter } from "../runtime/opencode.js";
 import { SkillStore } from "../skills/store.js";
-import { ToolSessionContextStore } from "../session/toolContextStore.js";
+import {
+  buildToolSessionScopeKey,
+  ToolSessionContextStore,
+} from "../session/toolContextStore.js";
 import {
   sanitizePersistentDocument,
   sanitizePersistentLine,
@@ -150,6 +153,11 @@ export class LearningOrchestrator {
         projectId: input.requestContext.projectId,
         projectKey: input.requestContext.projectKey,
         sessionId: gateSession.id,
+        sessionScopeKey: buildToolSessionScopeKey(
+          input.requestContext.actorKey,
+          input.requestContext.projectKey,
+          input.requestContext.clientSessionId,
+        ),
         traceId: input.requestContext.traceId,
       });
       await this.runtime.prompt(
@@ -239,6 +247,11 @@ export class LearningOrchestrator {
       projectId: input.requestContext.projectId,
       projectKey: input.requestContext.projectKey,
       sessionId: reviewSession.id,
+      sessionScopeKey: buildToolSessionScopeKey(
+        input.requestContext.actorKey,
+        input.requestContext.projectKey,
+        input.requestContext.clientSessionId,
+      ),
       traceId: input.requestContext.traceId,
     });
     try {

src/results/resolver.ts

@@ -1,5 +1,5 @@
 import { config } from "../config.js";
-import { readJsonFile } from "../utils/fileStore.js";
+import { atomicWriteJson, readJsonFile } from "../utils/fileStore.js";
 import {
   type ResultReferenceKind,
   type ResultReferenceRecord,
@@ -68,7 +68,15 @@ export class ResultReferenceResolver {
       throw new Error(`render payload file not found: ${filePath}`);
     }
 
-    const payload = extractRenderJunctionPayload(raw);
+    const payloadCandidate = normalizeRenderPayloadFile(raw, {
+      filePath,
+      projectId: input.projectId,
+    });
+    if (payloadCandidate.repaired) {
+      await atomicWriteJson(filePath, payloadCandidate.file);
+    }
+
+    const payload = extractRenderJunctionPayload(payloadCandidate.data);
     if (!payload) {
       throw new Error("render payload file does not contain a valid junction render payload");
     }
@@ -192,6 +200,39 @@ const normalizeDataForKind = (
   return data;
 };
 
+const normalizeRenderPayloadFile = (
+  value: unknown,
+  context: { filePath: string; projectId?: string },
+): { data: unknown; file: Record<string, unknown>; repaired: boolean } => {
+  if (!isRecord(value) || !("data" in value)) {
+    return {
+      data: value,
+      file: {
+        metadata: buildWrapperMetadata({}, value, context.projectId),
+        location: buildWrapperLocation(undefined, context.filePath),
+        data: value,
+      },
+      repaired: false,
+    };
+  }
+
+  const metadata = buildWrapperMetadata(value.metadata, value, context.projectId);
+  const location = buildWrapperLocation(value.location, context.filePath);
+  const next: Record<string, unknown> = {
+    ...value,
+    metadata,
+    location,
+  };
+
+  return {
+    data: next.data,
+    file: next,
+    repaired:
+      JSON.stringify(metadata) !== JSON.stringify(value.metadata ?? null) ||
+      JSON.stringify(location) !== JSON.stringify(value.location ?? null),
+  };
+};
+
 const unwrapReferencePayload = (value: unknown): Record<string, unknown> | null => {
   if (!isRecord(value)) {
     return null;
@@ -221,3 +262,48 @@ const projectData = (data: unknown, maxItems: number) => {
 
 const isRecord = (value: unknown): value is Record<string, unknown> =>
   typeof value === "object" && value !== null && !Array.isArray(value);
+
+const buildWrapperMetadata = (
+  value: unknown,
+  root: unknown,
+  fallbackProjectId?: string,
+) => {
+  const metadata = isRecord(value) ? { ...value } : {};
+  const source = isRecord(root) ? root : {};
+
+  if (typeof metadata.createdAt !== "string" || metadata.createdAt.trim().length === 0) {
+    const createdAt =
+      typeof source.createdAt === "string" && source.createdAt.trim().length > 0
+        ? source.createdAt.trim()
+        : new Date().toISOString();
+    metadata.createdAt = createdAt;
+  }
+
+  if (
+    typeof metadata.projectId !== "string" ||
+    metadata.projectId.trim().length === 0
+  ) {
+    const projectId =
+      typeof source.projectId === "string" && source.projectId.trim().length > 0
+        ? source.projectId.trim()
+        : fallbackProjectId;
+    if (projectId) {
+      metadata.projectId = projectId;
+    }
+  }
+
+  return metadata;
+};
+
+const buildWrapperLocation = (value: unknown, filePath: string) => {
+  if (isRecord(value)) {
+    return {
+      ...value,
+      file_path: filePath,
+    };
+  }
+
+  return {
+    file_path: filePath,
+  };
+};

src/results/store.ts

@@ -10,9 +10,11 @@ import {
   listJsonFiles,
   readJsonFile,
   removeFileIfExists,
+  toProjectKey,
 } from "../utils/fileStore.js";
 
-export const RESULT_REF_PATTERN = /^res-[a-f0-9-]{16}$/;
+export const RESULT_REF_PATTERN = /^res-[a-f0-9-]{8,64}$/;
+const RESULT_REF_FILE_PATTERN = /^(res-[a-f0-9-]{8,64})(?:\.json)?$/;
 
 export const RESULT_REFERENCE_KIND = {
   dynamicHttpResult: "dynamic-http-result",
@@ -138,12 +140,15 @@ export class ResultReferenceStore {
   }
 
   async getAuthorizedRecord(resultRef: string, context: RetrievalContext) {
-    if (!RESULT_REF_PATTERN.test(resultRef)) {
+    const normalizedResultRef = normalizeResultRef(resultRef);
+    if (!normalizedResultRef) {
       return null;
     }
 
-    const rawRecord = await readJsonFile<unknown>(this.filePath(resultRef));
-    const record = normalizeResultReferenceRecord(rawRecord);
+    const rawRecord = await readJsonFile<unknown>(this.filePath(normalizedResultRef));
+    const record =
+      normalizeResultReferenceRecord(rawRecord) ??
+      normalizeLegacyRenderReferenceRecord(rawRecord, normalizedResultRef, context);
     if (!record) {
       return null;
     }
@@ -301,6 +306,65 @@ const normalizeResultReferenceSource = (
 const isValidResultRef = (value: unknown): value is string =>
   typeof value === "string" && RESULT_REF_PATTERN.test(value);
 
+const normalizeResultRef = (value: string) => {
+  const match = value.trim().match(RESULT_REF_FILE_PATTERN);
+  return match?.[1] ?? null;
+};
+
+const normalizeLegacyRenderReferenceRecord = (
+  value: unknown,
+  resultRef: string,
+  context: RetrievalContext,
+): ResultReferenceRecord | null => {
+  const data = extractLegacyRenderPayload(value);
+  if (!data) {
+    return null;
+  }
+
+  const root = isRecord(value) ? value : {};
+  const metadata = isRecord(root.metadata) ? root.metadata : {};
+  const projectId = firstNonEmptyString(root.projectId, metadata.projectId);
+  const createdAt =
+    firstNonEmptyString(root.createdAt, metadata.createdAt) ?? new Date().toISOString();
+
+  return {
+    resultRef,
+    actorKey: context.actorKey,
+    clientSessionId: context.clientSessionId ?? "",
+    createdAt,
+    data,
+    kind: RESULT_REFERENCE_KIND.renderJunctionsPayload,
+    preview: buildPreview(data),
+    projectId,
+    projectKey: toProjectKey(projectId),
+    schemaVersion: 1,
+    sessionId: context.clientSessionId ?? resultRef,
+    sizeBytes: estimateBytes(data),
+    source: RESULT_REFERENCE_SOURCE.legacy,
+    traceId: "legacy-render-ref",
+  };
+};
+
+const extractLegacyRenderPayload = (value: unknown) => {
+  if (!isRecord(value)) {
+    return null;
+  }
+  const candidate = isRecord(value.data) ? value.data : value;
+  if (!isRecord(candidate.node_area_map)) {
+    return null;
+  }
+  return candidate;
+};
+
+const firstNonEmptyString = (...values: unknown[]) => {
+  for (const value of values) {
+    if (typeof value === "string" && value.trim().length > 0) {
+      return value.trim();
+    }
+  }
+  return undefined;
+};
+
 const isResultPreview = (value: unknown): value is ResultPreview =>
   isRecord(value) &&
   typeof value.count === "number" &&

src/routes/chat.ts

@@ -2,17 +2,20 @@ import { Router } from "express";
 import { z } from "zod";
 
 import { type LearningOrchestrator } from "../learning/orchestrator.js";
+import { type SessionHistoryStore } from "../history/store.js";
 import { logger } from "../logger.js";
 import { MemoryStore } from "../memory/store.js";
+import { type ConversationStateStore } from "../conversations/stateStore.js";
+import { type ConversationStore } from "../conversations/store.js";
 import { type ResultReferenceResolver } from "../results/resolver.js";
 import { RESULT_REFERENCE_KIND } from "../results/store.js";
 import { type OpencodeRuntimeAdapter } from "../runtime/opencode.js";
 import { type ChatSessionBridge } from "../chat/sessionBridge.js";
-import { toActorKey } from "../utils/fileStore.js";
+import { toActorKey, toProjectKey } from "../utils/fileStore.js";
 import {
   buildPromptWithLearningContext,
   generateSessionTitle,
-  getConversationTurnStats,
+  shouldGenerateSessionTitle,
 } from "./chatSession.js";
 import {
   collectTextContent,
@@ -31,20 +34,241 @@ const abortPayloadSchema = z.object({
   session_id: z.string().max(128),
 });
 
+const createSessionPayloadSchema = z.object({
+  session_id: z.string().max(128).optional(),
+  parent_session_id: z.string().max(128).optional(),
+});
+
 const forkPayloadSchema = z.object({
   session_id: z.string().max(128).optional(),
   keep_message_count: z.coerce.number().int().min(0),
 });
 
+const conversationStateSchema = z.object({
+  title: z.string().max(120).optional(),
+  is_title_manually_edited: z.boolean().optional(),
+  messages: z.array(z.unknown()).default([]),
+  branch_groups: z.array(z.unknown()).default([]),
+});
+
 export const buildChatRouter = (
   sessionBridge: ChatSessionBridge,
   runtime: OpencodeRuntimeAdapter,
+  conversationStore: ConversationStore,
+  conversationStateStore: ConversationStateStore,
   memoryStore: MemoryStore,
+  sessionHistoryStore: SessionHistoryStore,
   learningOrchestrator: LearningOrchestrator,
   resultReferenceResolver: ResultReferenceResolver,
 ) => {
   const chatRouter = Router();
 
+  chatRouter.post("/session", async (req, res) => {
+    const parsed = createSessionPayloadSchema.safeParse(req.body ?? {});
+    if (!parsed.success) {
+      res.status(400).json({
+        message: "invalid request payload",
+        detail: parsed.error.flatten(),
+      });
+      return;
+    }
+
+    const projectId = req.header("x-project-id") ?? undefined;
+    const userId = req.header("x-user-id") ?? undefined;
+    const actorKey = toActorKey(userId);
+    const projectKey = toProjectKey(projectId);
+
+    const { record, created } = await conversationStore.ensure({
+      actorKey,
+      parentSessionId: parsed.data.parent_session_id,
+      projectId,
+      projectKey,
+      sessionId: parsed.data.session_id,
+      userId,
+    });
+
+    res.status(created ? 201 : 200).json({
+      session_id: record.sessionId,
+      created_at: record.createdAt,
+      updated_at: record.updatedAt,
+      status: record.status,
+      title: record.title,
+      parent_session_id: record.parentSessionId,
+    });
+  });
+
+  chatRouter.get("/sessions", async (req, res) => {
+    const projectId = req.header("x-project-id") ?? undefined;
+    const userId = req.header("x-user-id") ?? undefined;
+    const actorKey = toActorKey(userId);
+    const projectKey = toProjectKey(projectId);
+    const records = await conversationStore.list({
+      actorKey,
+      projectId,
+      projectKey,
+      userId,
+    });
+    res.json({
+      sessions: records.map((record) => ({
+        id: record.sessionId,
+        title: record.title ?? "新对话",
+        created_at: record.createdAt,
+        updated_at: record.updatedAt,
+        status: record.status,
+        parent_session_id: record.parentSessionId,
+      })),
+    });
+  });
+
+  chatRouter.get("/session/:sessionId", async (req, res) => {
+    const sessionId = req.params.sessionId?.trim();
+    const projectId = req.header("x-project-id") ?? undefined;
+    const userId = req.header("x-user-id") ?? undefined;
+    const actorKey = toActorKey(userId);
+    const projectKey = toProjectKey(projectId);
+    if (!sessionId) {
+      res.status(400).json({ message: "session_id is required" });
+      return;
+    }
+
+    const conversation = await conversationStore.get(
+      {
+        actorKey,
+        projectId,
+        projectKey,
+        userId,
+      },
+      sessionId,
+    );
+    if (!conversation) {
+      res.status(404).json({ message: "session not found" });
+      return;
+    }
+
+    const state = await conversationStateStore.read(conversation.sessionScopeKey);
+    res.json({
+      id: conversation.sessionId,
+      title: conversation.title ?? "新对话",
+      is_title_manually_edited: state?.isTitleManuallyEdited ?? false,
+      created_at: conversation.createdAt,
+      updated_at: conversation.updatedAt,
+      status: conversation.status,
+      session_id: conversation.sessionId,
+      messages: state?.messages ?? [],
+      branch_groups: state?.branchGroups ?? [],
+      parent_session_id: conversation.parentSessionId,
+    });
+  });
+
+  chatRouter.put("/session/:sessionId", async (req, res) => {
+    const sessionId = req.params.sessionId?.trim();
+    const parsed = conversationStateSchema.safeParse(req.body ?? {});
+    if (!parsed.success) {
+      res.status(400).json({
+        message: "invalid request payload",
+        detail: parsed.error.flatten(),
+      });
+      return;
+    }
+
+    const projectId = req.header("x-project-id") ?? undefined;
+    const userId = req.header("x-user-id") ?? undefined;
+    const actorKey = toActorKey(userId);
+    const projectKey = toProjectKey(projectId);
+    if (!sessionId) {
+      res.status(400).json({ message: "session_id is required" });
+      return;
+    }
+
+    const { record } = await conversationStore.ensure({
+      actorKey,
+      projectId,
+      projectKey,
+      sessionId,
+      userId,
+    });
+    const nextRecord = await conversationStore.touch(record, {
+      ...(parsed.data.title ? { title: parsed.data.title } : {}),
+    });
+    await conversationStateStore.write(nextRecord.sessionScopeKey, {
+      sessionId: nextRecord.sessionId,
+      isTitleManuallyEdited: parsed.data.is_title_manually_edited,
+      messages: parsed.data.messages,
+      branchGroups: parsed.data.branch_groups,
+    });
+    res.json({
+      id: nextRecord.sessionId,
+      title: nextRecord.title ?? "新对话",
+      created_at: nextRecord.createdAt,
+      updated_at: nextRecord.updatedAt,
+      status: nextRecord.status,
+      session_id: nextRecord.sessionId,
+    });
+  });
+
+  chatRouter.patch("/session/:sessionId/title", async (req, res) => {
+    const sessionId = req.params.sessionId?.trim();
+    const title =
+      typeof req.body?.title === "string" ? req.body.title.trim() : "";
+    const isTitleManuallyEdited =
+      typeof req.body?.is_title_manually_edited === "boolean"
+        ? req.body.is_title_manually_edited
+        : undefined;
+    const projectId = req.header("x-project-id") ?? undefined;
+    const userId = req.header("x-user-id") ?? undefined;
+    const actorKey = toActorKey(userId);
+    const projectKey = toProjectKey(projectId);
+    if (!sessionId || !title) {
+      res.status(400).json({ message: "session_id and title are required" });
+      return;
+    }
+    const conversation = await conversationStore.get(
+      { actorKey, projectId, projectKey, userId },
+      sessionId,
+    );
+    if (!conversation) {
+      res.status(404).json({ message: "session not found" });
+      return;
+    }
+    const nextConversation = await conversationStore.touch(conversation, { title });
+    const state = await conversationStateStore.read(nextConversation.sessionScopeKey);
+    if (state) {
+      await conversationStateStore.write(nextConversation.sessionScopeKey, {
+        ...state,
+        isTitleManuallyEdited:
+          isTitleManuallyEdited ?? state.isTitleManuallyEdited,
+      });
+    }
+    res.json({
+      id: nextConversation.sessionId,
+      title: nextConversation.title,
+      updated_at: nextConversation.updatedAt,
+    });
+  });
+
+  chatRouter.delete("/session/:sessionId", async (req, res) => {
+    const sessionId = req.params.sessionId?.trim();
+    const projectId = req.header("x-project-id") ?? undefined;
+    const userId = req.header("x-user-id") ?? undefined;
+    const actorKey = toActorKey(userId);
+    const projectKey = toProjectKey(projectId);
+    if (!sessionId) {
+      res.status(400).json({ message: "session_id is required" });
+      return;
+    }
+    const conversation = await conversationStore.get(
+      { actorKey, projectId, projectKey, userId },
+      sessionId,
+    );
+    if (!conversation) {
+      res.status(204).end();
+      return;
+    }
+    await conversationStateStore.remove(conversation.sessionScopeKey);
+    await conversationStore.remove(conversation);
+    res.status(204).end();
+  });
+
   chatRouter.get("/render-ref/:renderRef", async (req, res) => {
     const renderRef = req.params.renderRef?.trim();
     const userId = req.header("x-user-id")?.trim();
@@ -99,20 +323,8 @@ export const buildChatRouter = (
     }
 
     try {
-      const authHeader = req.header("authorization");
-      const accessToken = authHeader?.startsWith("Bearer ")
-        ? authHeader.slice("Bearer ".length)
-        : authHeader;
-      const projectId = req.header("x-project-id") ?? undefined;
-      const traceId = req.header("x-trace-id") ?? undefined;
-      const userId = req.header("x-user-id") ?? undefined;
-
       const binding = await sessionBridge.abort({
         clientSessionId: parsed.data.session_id,
-        accessToken,
-        projectId,
-        traceId,
-        userId,
       });
 
       if (!binding) {
@@ -124,8 +336,6 @@ export const buildChatRouter = (
         {
           clientSessionId: parsed.data.session_id,
           sessionId: binding.sessionId,
-          traceId,
-          projectId,
         },
         "aborted chat session by client request",
       );
@@ -154,37 +364,69 @@ export const buildChatRouter = (
     }
 
     try {
-      const authHeader = req.header("authorization");
-      const accessToken = authHeader?.startsWith("Bearer ")
-        ? authHeader.slice("Bearer ".length)
-        : authHeader;
       const projectId = req.header("x-project-id") ?? undefined;
       const traceId = req.header("x-trace-id") ?? undefined;
       const userId = req.header("x-user-id") ?? undefined;
 
-      const { binding, requestContext } = await sessionBridge.fork({
-        clientSessionId: parsed.data.session_id,
-        accessToken,
+      const actorKey = toActorKey(userId);
+      const projectKey = toProjectKey(projectId);
+      const sourceClientSessionId = parsed.data.session_id?.trim();
+      const sourceConversation = sourceClientSessionId
+        ? await conversationStore.get(
+            {
+              actorKey,
               projectId,
-        traceId,
-        keepMessageCount: parsed.data.keep_message_count,
+              projectKey,
+              userId,
+            },
+            sourceClientSessionId,
+          )
+        : null;
+      const { record: targetConversation } = await conversationStore.ensure({
+        actorKey,
+        parentSessionId: sourceClientSessionId,
+        projectId,
+        projectKey,
         userId,
       });
+      const nextClientSessionId = targetConversation.sessionId;
+
+      if (sourceClientSessionId && parsed.data.keep_message_count > 0) {
+        await sessionHistoryStore.cloneThread(
+          {
+            actorKey,
+            clientSessionId: sourceClientSessionId,
+            projectKey,
+            sessionId: sourceClientSessionId,
+          },
+          {
+            actorKey,
+            clientSessionId: nextClientSessionId,
+            projectKey,
+            sessionId: nextClientSessionId,
+          },
+          parsed.data.keep_message_count,
+        );
+        if (sourceConversation?.title) {
+          await conversationStore.touch(targetConversation, {
+            title: sourceConversation.title,
+          });
+        }
+      }
 
       logger.info(
         {
           sourceClientSessionId: parsed.data.session_id,
-          clientSessionId: requestContext.clientSessionId,
-          sessionId: binding.sessionId,
-          traceId: requestContext.traceId,
-          projectId: requestContext.projectId,
+          clientSessionId: nextClientSessionId,
+          traceId,
+          projectId,
           keepMessageCount: parsed.data.keep_message_count,
         },
         "forked chat session",
       );
 
       res.status(200).json({
-        session_id: requestContext.clientSessionId,
+        session_id: nextClientSessionId,
       });
     } catch (error) {
       const detail = error instanceof Error ? error.message : String(error);
@@ -214,20 +456,38 @@ export const buildChatRouter = (
       const projectId = req.header("x-project-id") ?? undefined;
       const traceId = req.header("x-trace-id") ?? undefined;
       const userId = req.header("x-user-id") ?? undefined;
+      const actorKey = toActorKey(userId);
+      const projectKey = toProjectKey(projectId);
+      const { record: conversation, created: conversationCreated } =
+        await conversationStore.ensure({
+          actorKey,
+          projectId,
+          projectKey,
+          sessionId: parsed.data.session_id,
+          userId,
+        });
+      const activeConversation = await conversationStore.touch(conversation);
 
       const { binding, requestContext, created } = await sessionBridge.resolve({
-        clientSessionId: parsed.data.session_id,
+        clientSessionId: activeConversation.sessionId,
         accessToken,
         projectId,
         traceId,
         userId,
       });
+      const historyContext = {
+        actorKey: requestContext.actorKey,
+        clientSessionId: requestContext.clientSessionId,
+        projectKey: requestContext.projectKey,
+        sessionId: requestContext.clientSessionId,
+      };
+      const recentTurns = await sessionHistoryStore.getRecentTurns(historyContext, 8);
 
       logger.info(
         {
           clientSessionId: requestContext.clientSessionId,
           sessionId: binding.sessionId,
-          created,
+          created: created || conversationCreated,
           model: parsed.data.model,
           traceId: requestContext.traceId,
           projectId: requestContext.projectId,
@@ -260,6 +520,7 @@ export const buildChatRouter = (
           memoryStore,
           requestContext.actorKey,
           requestContext.projectKey,
+          recentTurns,
           parsed.data.message,
         );
         const streamResult = await streamPromptResponse({
@@ -285,23 +546,34 @@ export const buildChatRouter = (
             .reverse()
             .find((message) => message.info.role === "assistant");
           const assistantText = collectTextContent(assistantMessage?.parts ?? []);
-          const existingSessionTitle = sessionBridge.getSessionTitle(binding.sessionId);
+          const latestConversation =
+            (await conversationStore.get(
+              { actorKey, projectId, projectKey, userId },
+              activeConversation.sessionId,
+            )) ?? activeConversation;
+          const latestConversationState = await conversationStateStore.read(
+            latestConversation.sessionScopeKey,
+          );
+          const existingSessionTitle = latestConversation.title;
           let sessionTitle = existingSessionTitle;
-          const { userMessageCount, assistantMessageCount } =
-            await getConversationTurnStats(runtime, binding.sessionId);
-          const shouldGenerateTitle =
-            userMessageCount <= 3 &&
-            assistantMessageCount >= 1;
+          const shouldGenerateTitle = shouldGenerateSessionTitle({
+            recentTurnCount: recentTurns.length,
+            isTitleManuallyEdited:
+              latestConversationState?.isTitleManuallyEdited ?? false,
+          });
           if (shouldGenerateTitle) {
             sessionTitle = await generateSessionTitle(runtime, {
               sessionId: binding.sessionId,
+              latestAssistantMessage: assistantText,
               latestUserMessage: parsed.data.message,
               fallbackTitle: existingSessionTitle,
             });
-            if (sessionTitle !== existingSessionTitle) {
-              sessionBridge.setSessionTitle(binding.sessionId, sessionTitle);
-            }
           }
+          const nextConversation = await conversationStore.touch(latestConversation, {
+            ...(sessionTitle && sessionTitle !== existingSessionTitle
+              ? { title: sessionTitle }
+              : {}),
+          });
           if (!streamClosed && !res.writableEnded && !res.destroyed) {
             if (
               shouldGenerateTitle &&
@@ -321,18 +593,19 @@ export const buildChatRouter = (
               assistantMessage: assistantText,
               model: parsed.data.model,
               requestContext,
-              sessionId: binding.sessionId,
+              sessionId: clientSessionId,
               toolCallCount: streamResult.toolCallCount,
               userMessage: parsed.data.message,
             }).catch((error) => {
               logger.warn(
-                { err: error, sessionId: binding.sessionId },
+                { err: error, sessionId: clientSessionId },
                 "post-turn learning failed",
               );
             });
           }
         }
       } finally {
+        await sessionBridge.releaseRuntimeSession(clientSessionId, binding.sessionId);
         streamClosed = true;
         req.off("close", handleClientClose);
         res.off("close", handleClientClose);

src/routes/chatSession.ts

@@ -1,4 +1,5 @@
 import { logger } from "../logger.js";
+import { type SessionTurnRecord } from "../history/store.js";
 import { MemoryStore } from "../memory/store.js";
 import { type OpencodeRuntimeAdapter } from "../runtime/opencode.js";
 
@@ -8,15 +9,32 @@ const TITLE_PROMPT_TIMEOUT_MS = 5000;
 const TITLE_CONTEXT_MESSAGE_LIMIT = 40;
 const TITLE_CONTEXT_CHAR_LIMIT = 2400;
 const TITLE_CONTEXT_MESSAGE_CHAR_LIMIT = 240;
+const RESTORE_TURN_LIMIT = 8;
+const RESTORE_MESSAGE_CHAR_LIMIT = 480;
+const RESTORE_CONTEXT_CHAR_LIMIT = 3200;
+const DEFAULT_SESSION_TITLE = "新对话";
 
 const buildSessionTitle = (message: string) => {
   const normalized = message.replace(/\s+/g, " ").trim();
   if (!normalized) {
-    return "新对话";
+    return DEFAULT_SESSION_TITLE;
   }
   return normalized.length > 24 ? `${normalized.slice(0, 24)}...` : normalized;
 };
 
+const appendTitleContextMessage = (
+  lines: string[],
+  role: "用户" | "助手",
+  content: string | undefined,
+  maxLength = TITLE_CONTEXT_MESSAGE_CHAR_LIMIT,
+) => {
+  const normalized = content?.replace(/\s+/g, " ").trim();
+  if (!normalized) {
+    return;
+  }
+  lines.push(`${role}：${normalized.slice(0, maxLength)}`);
+};
+
 const buildTitleConversationContext = async (
   runtime: OpencodeRuntimeAdapter,
   sessionId: string,
@@ -63,7 +81,9 @@ const buildTitleConversationContext = async (
 const normalizeGeneratedTitle = (rawTitle: string, fallback: string) => {
   const normalized = rawTitle
     .replace(/\s+/g, " ")
+    .replace(/^标题[:：]\s*/i, "")
     .replace(/["'“”‘’`]/g, "")
+    .replace(/[。！？!?,，、；;：:]+$/g, "")
     .trim();
   if (!normalized) {
     return fallback;
@@ -71,18 +91,34 @@ const normalizeGeneratedTitle = (rawTitle: string, fallback: string) => {
   return normalized.length > 24 ? `${normalized.slice(0, 24)}...` : normalized;
 };
 
+export const shouldGenerateSessionTitle = (options: {
+  recentTurnCount: number;
+  isTitleManuallyEdited: boolean;
+}) => options.recentTurnCount <= 1 && !options.isTitleManuallyEdited;
+
 export const generateSessionTitle = async (
   runtime: OpencodeRuntimeAdapter,
   options: {
     sessionId: string;
     latestUserMessage: string;
+    latestAssistantMessage?: string;
     fallbackTitle?: string;
   },
 ) => {
-  const fallback = options.fallbackTitle?.trim() || buildSessionTitle(options.latestUserMessage);
+  const fallbackTitle = options.fallbackTitle?.trim();
+  const fallback =
+    fallbackTitle && fallbackTitle !== DEFAULT_SESSION_TITLE
+      ? fallbackTitle
+      : buildSessionTitle(options.latestUserMessage);
   let titleSessionId: string | undefined;
   try {
-    const conversation = await buildTitleConversationContext(runtime, options.sessionId);
+    const scopedContext: string[] = [];
+    appendTitleContextMessage(scopedContext, "用户", options.latestUserMessage, 480);
+    appendTitleContextMessage(scopedContext, "助手", options.latestAssistantMessage, 960);
+    const conversation =
+      scopedContext.length > 0
+        ? scopedContext.join("\n")
+        : await buildTitleConversationContext(runtime, options.sessionId);
     if (!conversation) {
       return fallback;
     }
@@ -95,8 +131,9 @@ export const generateSessionTitle = async (
         [
           "你是会话标题生成器。",
           "请根据下面整段多轮对话生成一个 8-16 字中文标题。",
-          "要求：简洁、可读、避免标点、不要引号、不要解释。",
-          "先理解完整对话，再概括核心任务或结论。",
+          "要求：简洁、具体、可读、避免标点、不要引号、不要解释。",
+          "优先概括用户当前真实需求和助手最终结论。",
+          "忽略系统提示、历史记忆、学习上下文、工具日志等元信息。",
           "不要直接照抄用户任一条消息原文。",
           "只输出标题本身。",
           "",
@@ -155,11 +192,51 @@ export const buildPromptWithLearningContext = async (
   memoryStore: MemoryStore,
   actorKey: string,
   projectKey: string,
+  recentTurns: SessionTurnRecord[],
   message: string,
 ) => {
   const snapshot = await memoryStore.buildPromptSnapshot({ actorKey, projectKey });
-  if (!snapshot) {
+  const restoredConversation = buildRestoredConversationContext(recentTurns);
+  if (!snapshot && !restoredConversation) {
     return message;
   }
-  return `${snapshot}\n\n[Current user request]\n${message}`;
+  return [snapshot, restoredConversation, `[Current user request]\n${message}`]
+    .filter(Boolean)
+    .join("\n\n");
+};
+
+const buildRestoredConversationContext = (recentTurns: SessionTurnRecord[]) => {
+  const formattedTurns = recentTurns
+    .slice(-RESTORE_TURN_LIMIT)
+    .flatMap((turn) => [
+      `用户：${compactMessage(turn.userMessage)}`,
+      `助手：${compactMessage(turn.assistantMessage)}`,
+    ])
+    .filter((entry) => entry.length > 0);
+
+  if (formattedTurns.length === 0) {
+    return "";
+  }
+
+  const conversation = formattedTurns.join("\n");
+  const trimmedConversation =
+    conversation.length > RESTORE_CONTEXT_CHAR_LIMIT
+      ? `${conversation.slice(0, RESTORE_CONTEXT_CHAR_LIMIT - 3)}...`
+      : conversation;
+
+  return [
+    "[Previous conversation context]",
+    "以下为当前前端对话线程中最近的历史对话，请延续其中已确认的目标、约束、结论与引用结果。",
+    trimmedConversation,
+  ].join("\n");
+};
+
+const compactMessage = (value: string) => {
+  const normalized = value.replace(/\s+/g, " ").trim();
+  if (!normalized) {
+    return "";
+  }
+  return normalized.length > RESTORE_MESSAGE_CHAR_LIMIT
+    ? `${normalized.slice(0, RESTORE_MESSAGE_CHAR_LIMIT - 3)}...`
+    : normalized;
 };

src/runtime/opencode.ts

@@ -54,14 +54,6 @@ export class OpencodeRuntimeAdapter {
     return requireData(response.data, "session.create");
   }
 
-  async getSession(id: string) {
-    const client = await this.ensureClient();
-    const response = await client.session.get({
-      sessionID: id,
-    });
-    return requireData(response.data, "session.get");
-  }
-
   async sendPrompt(sessionId: string, text: string) {
     await this.prompt(sessionId, text);
     // 当前 SDK 响应风格下，prompt() 本身不会直接返回完整 assistant parts，
@@ -103,15 +95,6 @@ export class OpencodeRuntimeAdapter {
     return requireData(messages.data, "session.messages");
   }
 
-  async forkSession(sessionId: string, messageId?: string) {
-    const client = await this.ensureClient();
-    const response = await client.session.fork({
-      sessionID: sessionId,
-      messageID: messageId,
-    });
-    return requireData(response.data, "session.fork");
-  }
-
   async abortSession(sessionId: string) {
     const client = await this.ensureClient();
     const response = await client.session.abort({

src/server.ts

@@ -5,6 +5,8 @@ import express from "express";
 import { SessionHistoryStore } from "./history/store.js";
 import { ChatSessionBridge } from "./chat/sessionBridge.js";
 import { config } from "./config.js";
+import { ConversationStateStore } from "./conversations/stateStore.js";
+import { ConversationStore } from "./conversations/store.js";
 import { logger } from "./logger.js";
 import { LearningOrchestrator } from "./learning/orchestrator.js";
 import { MemoryStore } from "./memory/store.js";
@@ -12,13 +14,13 @@ import { ResultReferenceResolver } from "./results/resolver.js";
 import { ResultReferenceStore } from "./results/store.js";
 import { buildChatRouter } from "./routes/chat.js";
 import { opencodeRuntime } from "./runtime/opencode.js";
-import { SessionRegistry } from "./session/registry.js";
 import { ToolSessionContextStore } from "./session/toolContextStore.js";
 import { DynamicHttpExecutor } from "./tools/dynamicHttpExecutor.js";
 
 const app = express();
-const registry = new SessionRegistry(config.SESSION_TTL_SECONDS);
-const sessionBridge = new ChatSessionBridge(registry, opencodeRuntime);
+const sessionBridge = new ChatSessionBridge(opencodeRuntime);
+const conversationStore = new ConversationStore();
+const conversationStateStore = new ConversationStateStore();
 const memoryStore = new MemoryStore();
 const sessionHistoryStore = new SessionHistoryStore();
 const toolContextStore = new ToolSessionContextStore();
@@ -63,12 +65,22 @@ app.post("/internal/tools/dynamic-http-call", async (req, res) => {
     return;
   }
 
-  const sessionId = typeof req.body?.sessionId === "string" ? req.body.sessionId : "";
-  const context = sessionBridge.getSessionContext(sessionId);
+  const sessionScopeKey =
+    typeof req.body?.sessionScopeKey === "string" ? req.body.sessionScopeKey : "";
+  const threadContext = await toolContextStore.read(sessionScopeKey);
+  const runtimeContext = sessionBridge.getActiveSensitiveContext(sessionScopeKey);
+  if (!threadContext && !runtimeContext) {
+    res.status(404).json({
+      message: "runtime or session context not found",
+      detail: sessionScopeKey,
+    });
+    return;
+  }
+  const context = runtimeContext ?? threadContext;
   if (!context) {
     res.status(404).json({
-      message: "session context not found",
-      detail: sessionId,
+      message: "runtime or session context not found",
+      detail: sessionScopeKey,
     });
     return;
   }
@@ -83,12 +95,12 @@ app.post("/internal/tools/dynamic-http-call", async (req, res) => {
         arguments: req.body?.arguments,
       },
       {
-        accessToken: context.accessToken,
+        accessToken: runtimeContext?.accessToken,
         actorKey: context.actorKey,
         clientSessionId: context.clientSessionId,
         projectId: context.projectId,
         projectKey: context.projectKey,
-        sessionId,
+        sessionId: context.clientSessionId,
         traceId: context.traceId,
       },
     );
@@ -108,13 +120,14 @@ app.post("/internal/tools/fetch-result-ref", async (req, res) => {
     return;
   }
 
-  const sessionId = typeof req.body?.sessionId === "string" ? req.body.sessionId : "";
+  const sessionScopeKey =
+    typeof req.body?.sessionScopeKey === "string" ? req.body.sessionScopeKey : "";
   const resultRef = typeof req.body?.result_ref === "string" ? req.body.result_ref : "";
-  const context = sessionBridge.getSessionContext(sessionId);
+  const context = await toolContextStore.read(sessionScopeKey);
   if (!context) {
     res.status(404).json({
       message: "session context not found",
-      detail: sessionId,
+      detail: sessionScopeKey,
     });
     return;
   }
@@ -127,6 +140,7 @@ app.post("/internal/tools/fetch-result-ref", async (req, res) => {
     resultRef,
     {
       actorKey: context.actorKey,
+      clientSessionId: context.clientSessionId,
       projectId: context.projectId,
     },
     {
@@ -149,13 +163,14 @@ app.post("/internal/tools/store-render-ref", async (req, res) => {
     return;
   }
 
-  const sessionId = typeof req.body?.sessionId === "string" ? req.body.sessionId : "";
+  const sessionScopeKey =
+    typeof req.body?.sessionScopeKey === "string" ? req.body.sessionScopeKey : "";
   const filePath = typeof req.body?.file_path === "string" ? req.body.file_path.trim() : "";
-  const context = sessionBridge.getSessionContext(sessionId);
+  const context = await toolContextStore.read(sessionScopeKey);
   if (!context) {
     res.status(404).json({
       message: "session context not found",
-      detail: sessionId,
+      detail: sessionScopeKey,
     });
     return;
   }
@@ -170,7 +185,7 @@ app.post("/internal/tools/store-render-ref", async (req, res) => {
       clientSessionId: context.clientSessionId,
       projectId: context.projectId,
       projectKey: context.projectKey,
-      sessionId,
+      sessionId: context.clientSessionId,
       source: "migration",
       traceId: context.traceId,
     });
@@ -198,13 +213,14 @@ app.post("/internal/tools/session-search", async (req, res) => {
     return;
   }
 
-  const sessionId = typeof req.body?.sessionId === "string" ? req.body.sessionId : "";
+  const sessionScopeKey =
+    typeof req.body?.sessionScopeKey === "string" ? req.body.sessionScopeKey : "";
   const query = typeof req.body?.query === "string" ? req.body.query : "";
-  const context = await toolContextStore.read(sessionId);
+  const context = await toolContextStore.read(sessionScopeKey);
   if (!context) {
     res.status(404).json({
-      message: "tool session context not found",
-      detail: sessionId,
+      message: "session context not found",
+      detail: sessionScopeKey,
     });
     return;
   }
@@ -231,7 +247,10 @@ app.use(
   buildChatRouter(
     sessionBridge,
     opencodeRuntime,
+    conversationStore,
+    conversationStateStore,
     memoryStore,
+    sessionHistoryStore,
     learningOrchestrator,
     resultReferenceResolver,
   ),
@@ -239,6 +258,8 @@ app.use(
 
 const bootstrap = async () => {
   await Promise.all([
+    conversationStore.initialize(),
+    conversationStateStore.initialize(),
     learningOrchestrator.initialize(),
     memoryStore.initialize(),
     resultReferenceStore.initialize(),

src/session/registry.ts

@@ -1,80 +0,0 @@
-import crypto from "node:crypto";
-
-export type SessionBinding = {
-  clientSessionId: string;
-  sessionId: string;
-  lastUsedAt: number;
-};
-
-export type SessionContext = {
-  clientSessionId: string;
-  accessToken?: string;
-  projectId?: string;
-  userId?: string;
-};
-
-export class SessionRegistry {
-  private readonly ttlMs: number;
-  private readonly bindings = new Map<string, SessionBinding>();
-
-  constructor(ttlSeconds: number) {
-    this.ttlMs = ttlSeconds * 1000;
-  }
-
-  upsert(context: SessionContext, sessionId: string): SessionBinding {
-    const binding: SessionBinding = {
-      clientSessionId: context.clientSessionId,
-      sessionId,
-      lastUsedAt: Date.now(),
-    };
-    this.bindings.set(this.makeKey(context), binding);
-    return binding;
-  }
-
-  get(context: SessionContext): SessionBinding | null {
-    const key = this.makeKey(context);
-    const binding = this.bindings.get(key);
-    if (!binding) {
-      return null;
-    }
-    if (Date.now() - binding.lastUsedAt > this.ttlMs) {
-      this.bindings.delete(key);
-      return null;
-    }
-    binding.lastUsedAt = Date.now();
-    return binding;
-  }
-
-  count(): number {
-    this.evictExpired();
-    return this.bindings.size;
-  }
-
-  evictExpired(): string[] {
-    const expired: string[] = [];
-    const now = Date.now();
-    for (const [key, binding] of this.bindings.entries()) {
-      if (now - binding.lastUsedAt > this.ttlMs) {
-        expired.push(binding.sessionId);
-        this.bindings.delete(key);
-      }
-    }
-    return expired;
-  }
-
-  private makeKey(context: SessionContext): string {
-    // 会话隔离不能只看前端 session_id；同一浏览器会话切换用户或项目时必须映射到不同 opencode session。
-    const digest = crypto
-      .createHash("sha256")
-      .update(
-        [
-          context.clientSessionId,
-          context.userId?.trim() ?? "",
-          context.projectId ?? "",
-        ].join("|"),
-      )
-      .digest("hex");
-
-    return digest;
-  }
-}

src/session/toolContextStore.ts

@@ -7,6 +7,7 @@ import {
   readJsonFile,
   removeFileIfExists,
 } from "../utils/fileStore.js";
+import { toConversationScopeKey } from "../utils/fileStore.js";
 
 export type ToolSessionContext = {
   actorKey: string;
@@ -16,6 +17,7 @@ export type ToolSessionContext = {
   projectId?: string;
   projectKey: string;
   sessionId: string;
+  sessionScopeKey: string;
   traceId: string;
 };
 
@@ -28,6 +30,9 @@ export class ToolSessionContextStore {
 
   async write(context: ToolSessionContext) {
     await atomicWriteJson(this.filePath(context.sessionId), context);
+    if (context.learningMode === "interactive" && context.sessionScopeKey) {
+      await atomicWriteJson(this.filePath(context.sessionScopeKey), context);
+    }
   }
 
   async read(sessionId: string) {
@@ -42,3 +47,9 @@ export class ToolSessionContextStore {
     return join(this.baseDir, `${sessionId}.json`);
   }
 }
+
+export const buildToolSessionScopeKey = (
+  actorKey: string,
+  projectKey: string,
+  clientSessionId: string,
+) => toConversationScopeKey(actorKey, projectKey, clientSessionId);

src/utils/fileStore.ts

@@ -149,6 +149,12 @@ export const toProjectKey = (projectId?: string) => toScopedKey("project", proje
 export const toStableId = (...parts: string[]) =>
   createHash("sha256").update(parts.join("|")).digest("hex").slice(0, 24);
 
+export const toConversationScopeKey = (
+  actorKey: string,
+  projectKey: string,
+  sessionId: string,
+) => `conversation-${toStableId(actorKey, projectKey, sessionId)}`;
+
 export const slugify = (value: string) =>
   value
     .toLowerCase()

tests/conversations/store.test.ts

@@ -0,0 +1,64 @@
+import { afterEach, beforeEach, describe, expect, it } from "bun:test";
+import { mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+import { ConversationStore } from "../../src/conversations/store.js";
+
+describe("ConversationStore", () => {
+  let tempDir: string;
+  let store: ConversationStore;
+
+  beforeEach(async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "tjwater-conversation-"));
+    store = new ConversationStore(tempDir);
+    await store.initialize();
+  });
+
+  afterEach(async () => {
+    await rm(tempDir, { force: true, recursive: true });
+  });
+
+  it("issues backend-managed session ids when absent", async () => {
+    const { record, created } = await store.ensure({
+      actorKey: "actor-1",
+      projectId: "project-1",
+      projectKey: "project-key-1",
+      userId: "user-1",
+    });
+
+    expect(created).toBe(true);
+    expect(record.sessionId).toStartWith("chat-");
+    expect(record.ownerUserId).toBe("user-1");
+    expect(record.status).toBe("active");
+  });
+
+  it("touches metadata and preserves scoped ownership", async () => {
+    const { record } = await store.ensure({
+      actorKey: "actor-2",
+      projectId: "project-2",
+      projectKey: "project-key-2",
+      sessionId: "existing-session",
+      userId: "user-2",
+    });
+
+    const touched = await store.touch(record, {
+      title: "新标题",
+    });
+
+    expect(touched.title).toBe("新标题");
+    expect(touched.updatedAt >= record.updatedAt).toBe(true);
+
+    const fetched = await store.get(
+      {
+        actorKey: "actor-2",
+        projectId: "project-2",
+        projectKey: "project-key-2",
+        userId: "user-2",
+      },
+      "existing-session",
+    );
+    expect(fetched?.sessionScopeKey).toBe(record.sessionScopeKey);
+    expect(fetched?.title).toBe("新标题");
+  });
+});

tests/history/store.test.ts

@@ -0,0 +1,138 @@
+import { afterEach, beforeEach, describe, expect, it } from "bun:test";
+import { mkdtemp, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+import { SessionHistoryStore } from "../../src/history/store.js";
+
+describe("SessionHistoryStore", () => {
+  let tempDir: string;
+  let store: SessionHistoryStore;
+
+  beforeEach(async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "tjwater-history-"));
+    store = new SessionHistoryStore(tempDir);
+    await store.initialize();
+  });
+
+  afterEach(async () => {
+    await rm(tempDir, { force: true, recursive: true });
+  });
+
+  it("falls back to legacy runtime-session transcripts by client session id and migrates on append", async () => {
+    await writeFile(
+      join(tempDir, "actor-1__project-1__runtime-session-1.json"),
+      JSON.stringify(
+        {
+          actorKey: "actor-1",
+          clientSessionId: "thread-1",
+          projectKey: "project-1",
+          sessionId: "runtime-session-1",
+          turns: [
+            {
+              id: "turn-1",
+              assistantMessage: "先检查泵站流量。",
+              timestamp: "2026-05-21T00:00:00.000Z",
+              toolCallCount: 1,
+              userMessage: "帮我看一下当前异常。",
+            },
+          ],
+          updatedAt: "2026-05-21T00:00:00.000Z",
+        },
+        null,
+        2,
+      ),
+      "utf8",
+    );
+
+    const recentTurns = await store.getRecentTurns(
+      {
+        actorKey: "actor-1",
+        clientSessionId: "thread-1",
+        projectKey: "project-1",
+        sessionId: "thread-1",
+      },
+      5,
+    );
+
+    expect(recentTurns).toHaveLength(1);
+    expect(recentTurns[0]?.userMessage).toBe("帮我看一下当前异常。");
+
+    const transcript = await store.appendTurn(
+      {
+        actorKey: "actor-1",
+        clientSessionId: "thread-1",
+        projectKey: "project-1",
+        sessionId: "thread-1",
+      },
+      {
+        assistantMessage: "已经定位到 3 条疑似异常支路。",
+        toolCallCount: 2,
+        userMessage: "继续分析这些支路。",
+      },
+    );
+
+    expect(transcript.sessionId).toBe("thread-1");
+    expect(transcript.turns).toHaveLength(2);
+  });
+
+  it("clones only the kept prefix when forking a thread", async () => {
+    await store.appendTurn(
+      {
+        actorKey: "actor-2",
+        clientSessionId: "thread-source",
+        projectKey: "project-2",
+        sessionId: "thread-source",
+      },
+      {
+        assistantMessage: "第一轮回复",
+        toolCallCount: 0,
+        userMessage: "第一轮提问",
+      },
+    );
+    await store.appendTurn(
+      {
+        actorKey: "actor-2",
+        clientSessionId: "thread-source",
+        projectKey: "project-2",
+        sessionId: "thread-source",
+      },
+      {
+        assistantMessage: "第二轮回复",
+        toolCallCount: 0,
+        userMessage: "第二轮提问",
+      },
+    );
+
+    const cloned = await store.cloneThread(
+      {
+        actorKey: "actor-2",
+        clientSessionId: "thread-source",
+        projectKey: "project-2",
+        sessionId: "thread-source",
+      },
+      {
+        actorKey: "actor-2",
+        clientSessionId: "thread-fork",
+        projectKey: "project-2",
+        sessionId: "thread-fork",
+      },
+      2,
+    );
+
+    expect(cloned.turns).toHaveLength(1);
+    expect(cloned.turns[0]?.userMessage).toBe("第一轮提问");
+
+    const forkRecentTurns = await store.getRecentTurns(
+      {
+        actorKey: "actor-2",
+        clientSessionId: "thread-fork",
+        projectKey: "project-2",
+        sessionId: "thread-fork",
+      },
+      5,
+    );
+    expect(forkRecentTurns).toHaveLength(1);
+    expect(forkRecentTurns[0]?.assistantMessage).toBe("第一轮回复");
+  });
+});

tests/results/store.test.ts

@@ -1,5 +1,5 @@
 import { afterEach, beforeEach, describe, expect, it } from "bun:test";
-import { mkdtemp, rm, writeFile } from "node:fs/promises";
+import { mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 
@@ -177,6 +177,13 @@ describe("ResultReferenceResolver", () => {
       filePath,
       JSON.stringify(
         {
+          metadata: {
+            createdAt: "2026-05-21T00:00:00.000Z",
+            projectId: "project-3",
+          },
+          location: {
+            file_path: filePath,
+          },
           data: {
             node_area_map: {
               J1: "DMA-1",
@@ -232,4 +239,179 @@ describe("ResultReferenceResolver", () => {
       },
     });
   });
+
+  it("repairs wrapper files that omit metadata and location", async () => {
+    const filePath = join(tempDir, "render-wrapper-missing-fields.json");
+    await writeFile(
+      filePath,
+      JSON.stringify(
+        {
+          data: {
+            node_area_map: {
+              J1: "DMA-1",
+            },
+          },
+          createdAt: "2026-05-21T00:00:00.000Z",
+        },
+        null,
+        2,
+      ),
+      "utf8",
+    );
+
+    const record = await resolver.registerRenderPayloadFile(filePath, {
+      actorKey: "actor-4",
+      clientSessionId: "client-4",
+      projectId: "project-4",
+      projectKey: "project-key-4",
+      sessionId: "session-4",
+      source: RESULT_REFERENCE_SOURCE.migration,
+      traceId: "trace-4",
+    });
+
+    expect(record.kind).toBe(RESULT_REFERENCE_KIND.renderJunctionsPayload);
+
+    const repaired = JSON.parse(await readFile(filePath, "utf8")) as {
+      metadata?: Record<string, unknown>;
+      location?: Record<string, unknown>;
+    };
+
+    expect(repaired.metadata).toEqual({
+      createdAt: "2026-05-21T00:00:00.000Z",
+      projectId: "project-4",
+    });
+    expect(repaired.location).toEqual({
+      file_path: filePath,
+    });
+  });
+
+  it("repairs wrapper files whose location points elsewhere", async () => {
+    const filePath = join(tempDir, "render-wrapper-wrong-location.json");
+    await writeFile(
+      filePath,
+      JSON.stringify(
+        {
+          metadata: {
+            createdAt: "2026-05-21T00:00:00.000Z",
+          },
+          location: {
+            file_path: "/tmp/elsewhere.json",
+            source: "legacy",
+          },
+          data: {
+            node_area_map: {
+              J1: "DMA-1",
+            },
+          },
+        },
+        null,
+        2,
+      ),
+      "utf8",
+    );
+
+    await resolver.registerRenderPayloadFile(filePath, {
+        actorKey: "actor-4",
+        clientSessionId: "client-4",
+        projectId: "project-4",
+        projectKey: "project-key-4",
+        sessionId: "session-4",
+        source: RESULT_REFERENCE_SOURCE.migration,
+        traceId: "trace-4",
+      });
+
+    const repaired = JSON.parse(await readFile(filePath, "utf8")) as {
+      metadata?: Record<string, unknown>;
+      location?: Record<string, unknown>;
+    };
+
+    expect(repaired.metadata).toEqual({
+      createdAt: "2026-05-21T00:00:00.000Z",
+      projectId: "project-4",
+    });
+    expect(repaired.location).toEqual({
+      file_path: filePath,
+      source: "legacy",
+    });
+  });
+
+  it("resolves legacy render payload files when callers include the json suffix", async () => {
+    const legacyRef = "res-c2fcee33-577e";
+    await writeFile(
+      join(tempDir, `${legacyRef}.json`),
+      JSON.stringify(
+        {
+          data: {
+            node_area_map: {
+              J1: "DMA-1",
+              J2: 2,
+            },
+            area_ids: ["DMA-1"],
+          },
+          createdAt: "2026-05-21T00:00:00.000Z",
+          projectId: "project-legacy-render",
+        },
+        null,
+        2,
+      ),
+      "utf8",
+    );
+
+    const result = await resolver.getFullAuthorized(
+      `${legacyRef}.json`,
+      {
+        actorKey: "actor-legacy-render",
+        clientSessionId: "chat-legacy-render",
+        projectId: "project-legacy-render",
+      },
+      {
+        expectedKind: RESULT_REFERENCE_KIND.renderJunctionsPayload,
+      },
+    );
+
+    expect(result?.result_ref).toBe(legacyRef);
+    expect(result?.kind).toBe(RESULT_REFERENCE_KIND.renderJunctionsPayload);
+    expect(result?.source).toBe(RESULT_REFERENCE_SOURCE.legacy);
+    expect(result?.data).toEqual({
+      node_area_map: {
+        J1: "DMA-1",
+        J2: "2",
+      },
+      area_ids: ["DMA-1"],
+    });
+  });
+
+  it("keeps legacy render payload files scoped to their project", async () => {
+    const legacyRef = "res-dddddddddddddddd";
+    await writeFile(
+      join(tempDir, `${legacyRef}.json`),
+      JSON.stringify(
+        {
+          data: {
+            node_area_map: {
+              J1: "DMA-1",
+            },
+          },
+          projectId: "project-allowed",
+        },
+        null,
+        2,
+      ),
+      "utf8",
+    );
+
+    const result = await resolver.getFullAuthorized(
+      legacyRef,
+      {
+        actorKey: "actor-legacy-render",
+        clientSessionId: "chat-legacy-render",
+        projectId: "project-denied",
+      },
+      {
+        expectedKind: RESULT_REFERENCE_KIND.renderJunctionsPayload,
+      },
+    );
+
+    expect(result).toBeNull();
+  });
 });

tests/routes/chatSession.test.ts

@@ -0,0 +1,73 @@
+import { describe, expect, it } from "bun:test";
+
+import {
+  generateSessionTitle,
+  shouldGenerateSessionTitle,
+} from "../../src/routes/chatSession.js";
+import { type OpencodeRuntimeAdapter } from "../../src/runtime/opencode.js";
+
+describe("shouldGenerateSessionTitle", () => {
+  it("allows auto-title generation for the first turn when the title was not edited", () => {
+    expect(
+      shouldGenerateSessionTitle({
+        recentTurnCount: 0,
+        isTitleManuallyEdited: false,
+      }),
+    ).toBe(true);
+  });
+
+  it("blocks auto-title generation after the user edits the title manually", () => {
+    expect(
+      shouldGenerateSessionTitle({
+        recentTurnCount: 0,
+        isTitleManuallyEdited: true,
+      }),
+    ).toBe(false);
+  });
+
+  it("only allows auto-title generation during the first two turns", () => {
+    expect(
+      shouldGenerateSessionTitle({
+        recentTurnCount: 1,
+        isTitleManuallyEdited: false,
+      }),
+    ).toBe(true);
+    expect(
+      shouldGenerateSessionTitle({
+        recentTurnCount: 2,
+        isTitleManuallyEdited: false,
+      }),
+    ).toBe(false);
+  });
+});
+
+describe("generateSessionTitle", () => {
+  it("uses the current user and assistant turn instead of reading wrapped runtime context", async () => {
+    let titlePrompt = "";
+    const runtime = {
+      createSession: async () => ({ id: "title-session" }),
+      prompt: async (_sessionId: string, prompt: string) => {
+        titlePrompt = prompt;
+      },
+      waitForSessionIdle: async () => undefined,
+      messages: async () => [
+        {
+          info: { role: "assistant" },
+          parts: [{ type: "text", text: "标题：泵站压力异常排查。" }],
+        },
+      ],
+      abortSession: async () => undefined,
+    } as unknown as OpencodeRuntimeAdapter;
+
+    const title = await generateSessionTitle(runtime, {
+      sessionId: "chat-session",
+      latestUserMessage: "检查一下三号泵站最近压力波动的原因",
+      latestAssistantMessage: "三号泵站压力波动主要与夜间阀门开度变化有关。",
+      fallbackTitle: "新对话",
+    });
+
+    expect(title).toBe("泵站压力异常排查");
+    expect(titlePrompt).toContain("用户：检查一下三号泵站最近压力波动的原因");
+    expect(titlePrompt).toContain("助手：三号泵站压力波动主要与夜间阀门开度变化有关。");
+  });
+});

tests/session/toolContextStore.test.ts

@@ -0,0 +1,51 @@
+import { afterEach, beforeEach, describe, expect, it } from "bun:test";
+import { mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+import {
+  buildToolSessionScopeKey,
+  ToolSessionContextStore,
+} from "../../src/session/toolContextStore.js";
+
+describe("ToolSessionContextStore", () => {
+  let tempDir: string;
+  let store: ToolSessionContextStore;
+
+  beforeEach(async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "tjwater-tool-context-"));
+    store = new ToolSessionContextStore(tempDir);
+    await store.initialize();
+  });
+
+  afterEach(async () => {
+    await rm(tempDir, { force: true, recursive: true });
+  });
+
+  it("writes interactive aliases under scoped session keys", async () => {
+    const sessionScopeKey = buildToolSessionScopeKey(
+      "actor-1",
+      "project-1",
+      "chat-session-1",
+    );
+
+    await store.write({
+      actorKey: "actor-1",
+      allowLearningWrite: true,
+      clientSessionId: "chat-session-1",
+      learningMode: "interactive",
+      projectId: "project-id-1",
+      projectKey: "project-1",
+      sessionId: "runtime-session-1",
+      sessionScopeKey,
+      traceId: "trace-1",
+    });
+
+    const runtimeContext = await store.read("runtime-session-1");
+    const scopedContext = await store.read(sessionScopeKey);
+
+    expect(runtimeContext?.clientSessionId).toBe("chat-session-1");
+    expect(scopedContext?.sessionScopeKey).toBe(sessionScopeKey);
+    expect(scopedContext?.sessionId).toBe("runtime-session-1");
+  });
+});